Nut-lock.



A. E. ARNOLD.

NUT LOCK. APPLICATION FILED MAY 11', 1912.

1,077,248 Patented Nov. 4, 1913.

as the nut 18 or cotter pin 19. The pressure upon the head 16 of the pin is then released, which causes thespring 17 to exert an outward tension to retain the head 16 within the bore 15 and the locking member for the pin within the bore 14. As the head 16 as well as the locking element for the pin are adapted to snugly engage within the angular pockets, it will be noted that the pinis held against rotation. Furthermore the spring 17 as well as the hinge pin and its locking member being fully concealed they will not be afiected by heat resulting from an over-heated journal, or from oxidation.

' Having thus described the invention, what I claim is 1. In combination, two members adapted to be pivotally connected to each other, pivot lugs on said members provided with alining bores, certain of said lugs having non-circular pockets formed therein of various relative depths contiguous the bores, a headed pivot bolt passed through the bores in said lugs and capable of longitudinal movement therein and having the head disposed within the deep pocket and of a contour similar to that of said pocket whereby turning movement of the bolt is prevented, a fasten ing device secured to one end of said bolt and disposed within the shallow pocket, and shaped to conform to the contour of said pocket whereby rotation of the fastening device within the pocket is prevented, and means surrounding the bolt and disposed within the deep pocket and acting normally to hold the fastening device within the respective pocket.

2. In combination, two members adapted to be pivot-ally connected to each other, a pivot lug on one of said members and formed with a bore, lugs on the other member spaced apart to embrace the first-mentioned lug and each formed with a bore alining with the bore in the first lug, and a non-circular pocket contiguous said bore and opening into the outer end of the respective lug, one of said pockets being of a depth greater than that of the other, a headed pivot pin passed through the aliningbores of said lugs and having the head thereof disposed within the relatively deep pocket,

posed within the deep pocket and shaped to conform to the contour of said poclret whereby rotation of the securing device within the pocket is prevented and contacting with said pin to hold the securing dejvice thereon in'normal position whereby acfcidental displacement of said fastening dejvice and pin is avoided.

, 3. In combination, two members adapted. to be pivotally connected to each other, a ipivot lug on one of said members and formed with a bore, lugs on the other member Ispaced apart'to embrace thefirst-mentioned glug and each formed with a bore alining ;with the bore in the first-mentioned lug, and.

fa non-circular pocket contiguous such bore and extending through the outer end of the respective lug, one of said pockets being of ,a depth greater than that of the other, Theaded pivot pin passed through the alining.

ibores of said lugs and having the head there-,

Eof disposed in the relatively deep pocket,

:and of a contour similar to that of said ipocket whereby turning movement of said.

ipin is prevented, a securing device on the Efree end of sald pin and adapted to normally lie within the shallow pocket and tend abutting the head of said bolt, said {spring acting upon the pin to hold the se lcuring device thereon in normal position land within the shallow pocket whereby ac- Ecidental displacement of said pin and fasten device is eliminated.

In testimony whereof I aiiix my signature in presence of two witnesses.

: ARTHUR E. ARNOLD.

Witnesses:

EDWIN P. Moses,

ARTHUR C. Mosrnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

